Finding the Fourth Proportional to 65,215.98, 89,966.01 and 42,544.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,215.98 : 89,966.01 = 42,544.50 : x
2. Step 2: Convert to fraction form
   65,215.98/89,966.01 = 42,544.50/x
3. Step 3: Cross multiply
   65,215.98x = 89,966.01 × 42,544.50
4. Step 4: Simplify right side
   65,215.98x = 3,827,558,912.45
5. Step 5: Solve for x
   x = 3,827,558,912.45/65,215.98
6. Step 6: Final answer
   x = 58,690.51